Upper Occoquan Service Authority
Sewage Lift Station Pump Replacement/ Sludge Return Pump Upgrade
UOSA IFB 27- 02 P2NR+ Construction- The project generally consists of nitrogen management process improvements andcomplementary Renewal and Replacement ( R/R) improvements at the Millard H. Robbins, Jr. Regional Water Reclamation Plant ( RWRP). Major work includesreplacement of eight ( 8) screw pumps at Primary Effluent Lift Stations ( PELS) 55/1and 55/2; upgrade of two ( 2) RAS pumps and increased pumping capacity at RASPump Station 9/1; and cyclone/settleability improvements at Selector Basins 56/1â
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